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The Versatile Harman Kardon HK 3390 Stereo Amplifier This receiver from the respected Harmon Kardon brand, is an audiophile-quality receiver that sells for under $300. It’s gets an average rating of 4.7 out 5 from 82+ Amazon reviewers. The Harman Kardon HK 3390 Stereo Receiver uses around 80 watts for both channels and there’s an FM tuner included with room for …